大港油田储层特征及敏感性评价

在综合分析研究大港油田两口预探井储层岩心资料的基础上，采用压汞分析、X射线衍射、滴定等方法，详细介绍了储层物性特征、孔隙结构特征、黏土矿物类型和含量及地层水组分，通过敏感性试验，主要包括速敏、水敏、盐敏、碱敏和酸敏等，揭示储层特征与地层损害因素的内在联系，系统评价了储层潜在损害因素类型和敏感性程度，结果表明:储层临界流速为0.1 mL/min，为中等速敏；临界矿化度为18 000 mg/L，具有中等程度的水敏效应；pH值为11时，储层具有强碱敏；储层岩心对盐酸和土酸均无敏感性，为可酸化处理储层。

Reservoir characteristics and sensitivity evaluation of Dagang oilfield

Based on the comprehensive analysis of reservoir core data for two mine shafts of Dagang oilfield，with the application of mercury analysis，X-ray diffraction，titration method，the physical properties of reservoir pore structure，clay mineral type and content and formation water component were described in detail. By the test of sensitivity（including velocity sensitivity，water sensitivity，salt sensitivity，alkali sensitivity and acid sensitivity and so on），the intrinsic link of the reservoir characteristics and formation damage factors were revealed，the potential damage to the reservoir type and sensitive factor degree were systematically evaluated. The results showed that:the reservoir critical flow rate is 0.1 mL/min，is in constant sensitization；critical salinity is 18 000 mg/L，with a moderate degree of water sensitivity effects；pH value of reservoir 11 having alkali-sensitive；reservoir core of hydrochloric acid and mud acid had no sensitivity to acidification process reservoir.